04/08/2012 10:36 am ET | Updated Apr 09, 2012

Henry Louis Gates Jr. Discovers Family Connection Between Kevin Bacon And Kyra Sedgwick On 'Finding Your Roots' (VIDEO)

Last week, we told you about how renowned Harvard professor, Henry Louis Gates Jr., helped media legend Barbara Walters uncover aspects of her family origins.

This week, he's taking on celebrity couple Kevin Bacon and Kyra Sedgwick.

In the fourth episode of the PBS series, "Finding Your Roots with Henry Louis Gates Jr.," Bacon and Sedgwick find out that they share something else besides being husband and wife. Gates has already tackled the ancestry of famous faces like Corey Booker, Harry Connick Jr. and Rep. John Lewis (D-Ga.), uncovering shocking and unknown aspects of their genealogy.

Find out what Bacon and Sedgwick discover Sunday night at 9 p.m. on PBS.